The Nasdaq-100 Index (NDX) is up about 22% year-to-date. That confirms stellar runs by most of the Magnificent Seven and some other well-known large- and megacap technology stocks. Yet even with those impressive performances, some investors are concerned valuations are stretched and that the megacap tech rally is now long in the tooth. Valid points to consider to be sure. However, market participants should be careful of letting those factors talk them out of embracing ETFs such as the Invesco Top QQQ ETF ( ...